DE3570569D1 - Hands-free control system for a radiotelephone - Google Patents

Hands-free control system for a radiotelephone


Publication number
DE3570569D1 DE8585904543A DE3570569A DE3570569D1 DE 3570569 D1 DE3570569 D1 DE 3570569D1 DE 8585904543 A DE8585904543 A DE 8585904543A DE 3570569 A DE3570569 A DE 3570569A DE 3570569 D1 DE3570569 D1 DE 3570569D1
Prior art keywords
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Application number
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German (de)
David Borth
Ira Gerson
Richard Vilmur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Solutions Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Application filed by Motorola Solutions Inc filed Critical Motorola Solutions Inc
Priority to PCT/US1985/001672 priority Critical patent/WO1987001546A1/en
Application granted granted Critical
Publication of DE3570569D1 publication Critical patent/DE3570569D1/en
First worldwide family litigation filed litigation Critical "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Expired legal-status Critical Current



    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/26Devices for signalling identity of wanted subscriber
    • H04M1/27Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/271Devices whereby a plurality of signals may be stored simultaneously controlled by voice recognition
    • G10L15/00Speech recognition
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/60Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges including speech amplifiers
    • H04M1/6033Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
    • H04M1/6041Portable telephones adapted for handsfree use
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/13Acoustic transducers and sound field adaptation in vehicles


PCT No. PCT/US85/01672 Sec. 371 Date Sep. 3, 1985 Sec. 102(e) Date Sep. 3, 1985 PCT Filed Sep. 3, 1985 PCT Pub. No. WO87/01546 PCT Pub. Date Mar. 12, 1987.An improved hands-free user-interactive control and dialing system is disclosed for use with a speech communications device. The control system (400) includes a dynamic noise suppressor (410), a speech recognizer (420) for implementing voice-control, a device controller (430) responsive to the speech recognizer for controlling operating parameters of the speech communications device (450) and for producing status information representing the operating status of the device, and a speech synthesizer (440) for providing reply information to the user as to the speech communications device operating status. In a mobile radiotelephone application, the spectral subtraction noise suppressor (414) is configured to improve the performance of the speech recognizer (424), the voice quality of the transmitted audio (417), and the audio switching operation of the vehicular speakerphone (460). The combination of noise processing, speech recognition, and speech synthesis provides a substantial improvement to prior art control systems.
DE8585904543A 1985-09-03 1985-09-03 Hands-free control system for a radiotelephone Expired DE3570569D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1985/001672 WO1987001546A1 (en) 1985-09-03 1985-09-03 Hands-free control system for a radiotelephone

Publications (1)

Publication Number Publication Date
DE3570569D1 true DE3570569D1 (en) 1989-06-29



Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585904543A Expired DE3570569D1 (en) 1985-09-03 1985-09-03 Hands-free control system for a radiotelephone

Country Status (7)

Country Link
US (1) US4737976A (en)
EP (1) EP0235127B2 (en)
JP (1) JP2654942B2 (en)
AT (1) AT43467T (en)
DE (1) DE3570569D1 (en)
HK (1) HK54192A (en)
WO (1) WO1987001546A1 (en)

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Also Published As

Publication number Publication date
WO1987001546A1 (en) 1987-03-12
JPS63501537A (en) 1988-06-09
JP2654942B2 (en) 1997-09-17
US4737976A (en) 1988-04-12
AT43467T (en) 1989-06-15
HK54192A (en) 1992-07-30
EP0235127B1 (en) 1989-05-24
EP0235127A1 (en) 1987-09-09
EP0235127B2 (en) 1993-05-05

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